3111201311 has 4 divisors (see below), whose sum is σ = 3114322872. Its totient is φ = 3108079752.

The previous prime is 3111201307. The next prime is 3111201349. The reversal of 3111201311 is 1131021113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3111201311 - 2² = 3111201307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111206311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1559285 + ... + 1561278.

It is an arithmetic number, because the mean of its divisors is an integer number (778580718).

Almost surely, 2^3111201311 is an apocalyptic number.

3111201311 is a deficient number, since it is larger than the sum of its proper divisors (3121561).

3111201311 is an equidigital number, since it uses as much as digits as its factorization.

3111201311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121560.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 3111201311 is about 55778.1436675693. The cubic root of 3111201311 is about 1459.8538214503.

Adding to 3111201311 its reverse (1131021113), we get a palindrome (4242222424).

The spelling of 3111201311 in words is "three billion, one hundred eleven million, two hundred one thousand, three hundred eleven".